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UK Road Signs

Warning sign

Height warning bells sign

Height warning bells: a row of bells hanging from a wire across the road between two posts
Sign image: Department for Transport, © Crown copyright

What does the Height warning bells sign mean?

Bells hung over the road at a railway crossing. They ring if a vehicle is too tall to pass safely under the electric cables.

Also known as: Bells over the road

What it means

Bells give an audible warning if your vehicle is too tall for the overhead cables.

Bells are suspended over the road at some railway crossings. They give an audible warning to drivers of vehicles that exceed the safe height beneath electrified overhead cables.

If you hear them, stop. Your vehicle is too tall to pass under the cables safely.

Where you'll see it

Before electrified railway crossings.

Rules to know

  • Bells are suspended over the road at a railway crossing to give an audible warning to drivers of vehicles that exceed the safe height beneath electrified overhead cables.

    Know Your Traffic Signs, p. 29

Common mistakes

  • Mistake: Driving on after hearing the bells.

    Instead: The bells mean your vehicle is too tall. Stop.

Test yourself

Recalling the answer helps it stick. Pick an answer to see how you did.

Question 1 of 1

What does this sign mean?

A wire strung between two black-and-white posts with a row of small bells hanging from it

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© Crown copyright. Free to reuse under the Open Government Licence v3.0, as long as the sign is reproduced accurately and not in a misleading context.

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Sources

Sign image: Department for Transport, Traffic sign images (diagram 781). © Crown copyright, reused under the Open Government Licence v3.0.

Last reviewed 11 October 2026. This page explains the sign in our own words; for the full rules, see The Highway Code. How we source and check content